Protector for acoustic apparatus



June 22 1926.

J. P. MAXFIELD PROTECTOR FOR ACOUSTIC APPARATUS Filed DeG. 27, 1922 Patented June 22, 1.926.

UNITED STATES PATENT OFFICE.

JOSEPH P. MAXFIELD, OF MAPLEWOOD, NEW JERSEY, ASSIGNOB TO WESTEBNELEC- TBIC COMPANY, INCORPORATED, OFNEW YORK, N. Y., A CORPORATION OF NEW YORK.

PROTECTOR FOR ACOUSTIC APPARATUS.

Application med December 27, '1922. semi 1n. sosao.-

This invention relates to shields or protectors for acoustic apparatus and partlcularly for transmitters used in public address or loud speaking systems.

The object of the invention is to provide a cheap and eflcient shield for protecting acoustic devices against wind noises.

In general, the invention provides a shield vcomprising two or more spacedv screens placed in front of a transmitter for protectin it against wind noises. Morespecifical y the invention' comprises an inclosure having walls of spaced parallel screens formed of fine mesh and resilient mearns f or supporting a transmitter within said 1nclosure.

Fig, 1 is a front view partly in section of a transmitter mounting embodying the invention and adapted for holding two transmitters.

Fig. 2 is a cross section of the transmitter mounting shown on Fig. 1.

Fig. 3 is a front View, part in section, of another form embodying the invention.

Fig. 4 is a cross section of the mounting shown in Fig. 3. Y ,Y

Fig. 1 shows a soundtranslating device housing having side walls 6, a bottom 7 and a top 8 lined with a sound deadening material 9, such as felt. 'Attached to the top 8 and the bottom 7 are screw eyes 10 from which a transmitter 11 of any suitable type, may be supported by means of springs 12. The front and' rear Walls may be formed of rectangular frames 13-13 on each side of which are placed screens 15 and 16. A space is thereby provided between the screens 1n which the energ due to wind noises is dissipated so that 1t does not reach the sound translating device which may be a telephone transmitter.

In the modification shown in Figs. 3 and 4 all of the walls are formed of two spaced continuous screens. On the base 20 is a raised portion 21 upon which is supported a frame 22 by' means of screws 23. The transmitter 11 in this case is resiliently sup ported by s rings 12 connected to screw eyes 25 in t e raised portion 21, and the frame 22. The screens 26 and 27 are attached to tlie inner and outer edges of the horizontal spacerframes 28 and 29 which are substantially rectangular in shape, and are held against lateral displacement by the portion 21 of the base 20. A cover 30 is screwed to frame 22 and serves to hold the sides in place.

In the drawings the housing shown is provided withv means for supporting two transmitters. Obviously, however, means may be provided for the mounting of a single transmitter.

The screens used may be of gauze of any A suitable mesh, the inner and outer screens may have the same or a different mesh. Very satisfactory results have been obtained byxmaking both the inner and outer screen ofj mesh per inch bronze gauze.

The invention claimed is:

The combination with telephone transmitters of a protector therefor, said protector comprising a base, walls each having a lurality of spaced screens, and a cover, said base, walls and cover forming an inclosure for eliminating wind noises, and means within said inclosure for supporting said transmitters.

In witness whereof, I hereunto subscribe my name this 26th day of December A. D., 1922.

JOSEPH P. MAXFIELD. 

